<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">monochords</topic></authority><related type="narrower"><topic>keyed monochords</topic></related><related type="other"><topic>sonometers</topic></related><related type="broader"><topic>zitherlike chordophones: plucked</topic></related><related type="broader"><topic>tuning devices</topic></related><variant type="other"><topic>monochord</topic></variant> <note xml:lang="en"><![CDATA[ Ancient single-string instruments, first mentioned in 5th century BCE Greece, used variously throughout history as a musical instrument, a device for measuring and demonstrating musical intervals, and an organ tuner's and piano tuner's adjunct. ]]></note></mads>